{
    "type": "product",
    "name": "Sigma 20mm f/1.8",
    "url": "https://www.cameraworth.com/s/sigma/20mm-f-1-8/",
    "brand": {
        "name": "Sigma",
        "url": "https://www.cameraworth.com/s/sigma/"
    },
    "answer": "The Sigma 20mm f/1.8 has 1 recorded sale: £80 (29 Oct 2015, Special Auction Services). That is too few for a typical price.",
    "figure": {
        "grade": "sales_only",
        "grade_label": "Sales only",
        "modifiers": [
            "old",
            "version_mix"
        ],
        "n": 1,
        "median_gbp": null,
        "middle_half_gbp": null,
        "period": [
            "2015-10-29",
            "2015-10-29"
        ],
        "last_3_years": null,
        "pools": null,
        "one_sale_moves_this": null,
        "extras": null,
        "basis": "Auction hammer prices with the buyer’s premium removed; eBay as sold"
    },
    "reason": null,
    "versions": [
        {
            "name": "EX DG Aspherical RF",
            "url": "https://www.cameraworth.com/s/sigma/20mm-f-1-8/v/20mm-f-1-8-ex-dg-aspherical-rf/",
            "kind": "working",
            "n": 0,
            "grade": "none",
            "median_gbp": null
        }
    ],
    "set_apart": [],
    "version_status": {
        "matched": 0,
        "pending": 1,
        "undeterminable": 0
    },
    "book_guide": null,
    "sales_shown": [
        {
            "id": 81545,
            "date": "2015-10-29",
            "venue": "Special Auction Services",
            "title": "A Sigma DG f/1.8 20mm Lens",
            "price": 80,
            "currency": "GBP",
            "gbp": 80,
            "basis": "hammer",
            "version": null,
            "version_status": "pending",
            "in_typical_price": true,
            "set_apart": null,
            "flags": [],
            "source_url": "https://web.archive.org/web/20160206103747/http://www.specialauctionservices.com:80/large/cm291015/lot0162.html",
            "lot": "162"
        }
    ],
    "sales_ledger": "https://www.cameraworth.com/s/sigma/20mm-f-1-8/sales/",
    "citation": "“Sigma 20mm f/1.8: 1 recorded sale, October 2015; no typical price (method v1).” cameraworth.com, retrieved 8 October 2026. https://www.cameraworth.com/s/sigma/20mm-f-1-8/",
    "method": {
        "version": 1,
        "url": "https://www.cameraworth.com/methodology/"
    },
    "computed_at": "2026-10-08 00:10:00.968880",
    "attribution": "Data from cameraworth.com — a public register of what cameras and lenses actually sold for. Cite the page URL and the retrieval date; see /methodology/ for how each figure is made."
}